android - onActivityResult() 中结果代码code为-1且返回intent为null

Question

我正在尝试通过以下代码初始化图像选择器对话框: Intent 选择器Intent = null;

    List<Intent> intentList = new ArrayList<>();

    Intent pickIntent = new Intent(Intent.ACTION_PICK,
            android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
    Intent takePhotoIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    takePhotoIntent.putExtra("return-data", true);
    takePhotoIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(getTempFile(context)));
    intentList = addIntentsToList(context, intentList, pickIntent);
    intentList = addIntentsToList(context, intentList, takePhotoIntent);

    if (intentList.size() > 0) {
        chooserIntent = Intent.createChooser(intentList.remove(intentList.size() - 1), "");
        chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, intentList.toArray(new Parcelable[intentList.size()]));
    }
    startActivityForResult(chooserIntent, PICK_IMAGE_ID);

但是有

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch(requestCode) {
            case PICK_IMAGE_ID:
                Bitmap bitmap = ImagePicker.getImageFromResult(this, resultCode, data);
                currentImageButton.setImageDrawable(new BitmapDrawable(bitmap));
                break;
            default:
                break;
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

我得到 null Intent 和 -1 resultCode

我已经在其中添加了显示权限:

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA" />

代码在大多数设备上运行良好，但在 samsung duos 上运行失败。我哪里错了？

UPD

activity

image picker class

Answer 1

没关系，你会得到 -1 - 这意味着 public static final int RESULT_OK (参见 Activity 类)。

Null作为 Intent ，您已经在此处定义了输出 uri:

i.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(getTempFile(context)));

(即您可以只使用 Uri ，一旦您得到确认，捕获就完成了)

关于图像选取，我是这样做的(这几乎是一样的，正如谷歌在 Taking Photos Simply 文章中所建议的那样):

.....
private Uri capturedImageURI;
.....

    capturedImageURI = Uri.fromFile(createImageFile());
    final Intent captureIntent = new Intent(
            android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
    captureIntent.putExtra(MediaStore.EXTRA_OUTPUT, capturedImageURI);
    Intent chooserIntent = Intent.createChooser(new Intent(Intent.ACTION_PICK).setType("image/*"), "Select Picture");
    chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, new Parcelable[] { captureIntent });
    startActivityForResult(chooserIntent, 42);

.....

public File createImageFile() {
    File imageStorageDir = new File(
            Environment.getExternalStoragePublicDirectory(
                    Environment.DIRECTORY_PICTURES)
            , "MyAppPictures");

    if (!imageStorageDir.exists()) {
        imageStorageDir.mkdirs();
    }

    return new File(
            imageStorageDir + File.separator + "IMG_"
                    + String.valueOf(System.currentTimeMillis())
                    + ".jpg");
}    

.....

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == Activity.RESULT_OK) {
        if (data != null) {
             capturedImageURI = data.getData();  
        }
        ((ImageView)findViewById(R.id.capturedImageView)).setImageURI(capturedImageURI);
    }
}

注意!您需要这些权限才能使其正常工作:

<uses-feature android:name="android.hardware.camera"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

在 Android 6.0 中，您必须先检查权限，然后才能从外部存储获取数据。